See ?rect
library(zoo)
d1 <- as.Date("2007-04-12")
d2 <- as.Date("2008-05-14")
plot(SP500, type = "n")
rect(d1, par("usr")[3], d2, par("usr")[4], col = "red", border = 0)
lines(SP500)
Also, there is an example using the lattice/grid-based xyplot.zoo in ?xyplot.zoo
On Thu, Jun 19, 2008 at 10:48 AM, Vorlow Constantinos
<[EMAIL PROTECTED]> wrote:
> Dear list members,
>
> How can I shade the background area of a zoo time series object between
> specific dates?
>
> eg.
>
> library(tseries)
> library(zoo)
> SP500<-get.hist.quote("^GSPC", start = "1990-01-01", quote =
> "Close")
> plot(SP500)
>
> How can I produce the same plot but with a (say) red background between
>
> 2007-04-12
>
> and
>
> 2008-05-14
>
> ?
>
> Many thanks in advance...
>
> Costas
>
>
> P Think before you print.
>
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